package artid.com.arttogoa.util;

import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Date;

import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.Bitmap.CompressFormat;
import android.graphics.Bitmap.Config;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.media.ExifInterface;
import android.net.Uri;
import android.os.Environment;
import android.provider.MediaStore;
import android.provider.MediaStore.Images.ImageColumns;
import android.text.format.DateFormat;
import android.util.Base64;
import android.util.Log;

/**
 * 
 * TODO <图片处理类>
 * 
 * @author 熊彬
 * @data: 2016-5-21 下午4:42:46
 * @version: V1.0
 */
public class BitmapUtil {
	/**
	 * 以最省内存的方式读取本地资源的图片
	 * 
	 * @param context
	 * @param resId
	 * @return
	 */
	public static Bitmap readBitMap(Context context, int resId) {
		BitmapFactory.Options opt = new BitmapFactory.Options();
		opt.inPreferredConfig = Bitmap.Config.RGB_565;
		opt.inPurgeable = true;
		opt.inInputShareable = true;
		// 获取资源图片
		InputStream is = context.getResources().openRawResource(resId);
		return BitmapFactory.decodeStream(is, null, opt);
	}

	/***
	 * 等比例压缩图片
	 * 
	 * @param bitmap
	 * @param screenWidth
	 * @param screenHight
	 * @return
	 */
	public static Bitmap getBitmap(Bitmap bitmap, int screenWidth,
			int screenHight) {
		int w = bitmap.getWidth();
		int h = bitmap.getHeight();
		Log.e("jj", "图片高度" + h + ",图片宽度" + w);
		Log.e("jj", "screenHight=" + screenHight + ",screenWidth="
				+ screenWidth);
		Matrix matrix = new Matrix();
		float scale = (float) screenWidth / w;
		float scale2 = (float) screenHight / h;

		 scale = scale < scale2 ? scale : scale2;

		// 保证图片不变形.
		matrix.postScale(scale, scale);
		return Bitmap.createBitmap(bitmap, 0, 0, w, h, matrix, true);
	}

	public static Bitmap stringtoBitmap(String string) {
		// 将字符串转换成Bitmap类型(也叫base64转换成bitmap)
		Bitmap bitmap = null;
		try {
			byte[] bitmapArray;
			bitmapArray = Base64.decode(string, Base64.DEFAULT);
			bitmap = BitmapFactory.decodeByteArray(bitmapArray, 0,
					bitmapArray.length);
		} catch (Exception e) {
			e.printStackTrace();
		}

		return bitmap;
	}

	/**
	 * Try to return the absolute file path from the given Uri
	 * 
	 * @param context
	 * @param uri
	 * @return the file path or null
	 */
	public static String getRealFilePath(final Context context, final Uri uri) {
		if (null == uri)
			return null;
		final String scheme = uri.getScheme();
		String data = null;
		if (scheme == null)
			data = uri.getPath();
		else if (ContentResolver.SCHEME_FILE.equals(scheme)) {
			data = uri.getPath();
		} else if (ContentResolver.SCHEME_CONTENT.equals(scheme)) {
			Cursor cursor = context.getContentResolver().query(uri,
					new String[] { ImageColumns.DATA }, null, null, null);
			if (null != cursor) {
				if (cursor.moveToFirst()) {
					int index = cursor.getColumnIndex(ImageColumns.DATA);
					if (index > -1) {
						data = cursor.getString(index);
					}
				}
				cursor.close();
			}
		}
		return data;
	}

	public static String bitmaptoString(Bitmap bitmap) {
		// 将Bitmap转换成字符串（也叫bitmap转换成base64）
		try {
			String string = null;
			ByteArrayOutputStream bStream = new ByteArrayOutputStream();
			bitmap.compress(CompressFormat.PNG, 100, bStream);
			byte[] bytes = bStream.toByteArray();
			string = Base64.encodeToString(bytes, Base64.DEFAULT);
			return string;
		} catch (Exception e) {
			// TODO: handle exception
			return "";
		}
	}

	/**
	 * 将 Drawable 转为 Bitmap
	 */
	public static Bitmap drawableToBitmap(Drawable drawable) {
		return drawable == null ? null : ((BitmapDrawable) drawable)
				.getBitmap();
	}

	/**
	 * 将 Bitmap 转换为 Drawable
	 */
	public static Drawable bitmapToDrawable(Bitmap bitmap) {
		return bitmap == null ? null : new BitmapDrawable(bitmap);
	}

	public static void saveFile(Bitmap bitmap, String path) {
		try {
			String filePath = path + File.separator + "header.jpg";
			File dirFile = new File(path);
			if (!dirFile.exists()) {
				dirFile.mkdir();
			}
			File myCaptureFile = new File(filePath);
			BufferedOutputStream bos = new BufferedOutputStream(
					new FileOutputStream(myCaptureFile));
			bitmap.compress(Bitmap.CompressFormat.JPEG, 100, bos);
			bos.flush();
			bos.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
		
	}

	/**
	 * 压缩图片
	 * 
	 * @param bitMap
	 * @param needRecycle
	 * @return
	 */
	public static Bitmap createBitmapThumbnail(Bitmap bitMap,
			boolean needRecycle) {
		int width = bitMap.getWidth();
		int height = bitMap.getHeight();
		// 设置想要的大小
		int newWidth = 120;
		int newHeight = 120;
		// 计算缩放比例
		float scaleWidth = ((float) newWidth) / width;
		float scaleHeight = ((float) newHeight) / height;
		// 取得想要缩放的matrix参数
		Matrix matrix = new Matrix();
		matrix.postScale(scaleWidth, scaleHeight);
		// 得到新的图片
		Bitmap newBitMap = Bitmap.createBitmap(bitMap, 0, 0, width, height,
				matrix, true);
		if (needRecycle)
			bitMap.recycle();
		return newBitMap;
	}

	/**
	 * 计算图片的缩放值 如果图片的原始高度或者宽度大与我们期望的宽度和高度，我们需要计算出缩放比例的数值。否则就不缩放。
	 * heightRatio是图片原始高度与压缩后高度的倍数， widthRatio是图片原始宽度与压缩后宽度的倍数。
	 * inSampleSize就是缩放值 ，取heightRatio与widthRatio中最小的值。
	 * inSampleSize为1表示宽度和高度不缩放，为2表示压缩后的宽度与高度为原来的1/2(图片为原1/4)。
	 * 
	 * @param options
	 * @param reqWidth
	 * @param reqHeight
	 * @return
	 */
	public static int calculateInSampleSize(BitmapFactory.Options options,
			int reqWidth, int reqHeight) {
		// Raw height and width of image
		final int height = options.outHeight;
		final int width = options.outWidth;
		int inSampleSize = 1;

		if (height > reqHeight || width > reqWidth) {

			// Calculate ratios of height and width to requested height and
			// width
			final int heightRatio = Math.round((float) height
					/ (float) reqHeight);
			final int widthRatio = Math.round((float) width / (float) reqWidth);

			// Choose the smallest ratio as inSampleSize value, this will
			// guarantee
			// a final image with both dimensions(尺寸) larger than or equal to
			// the requested height and width.
			inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio;
		}

		return inSampleSize;
	}

	/**
	 * 根据路径获得图片并压缩返回bitmap,并做出圆角处理用于显示
	 * 
	 * @return
	 */
	public static Bitmap getSmallFilletBitmap(String filePath, int w, int h) {
		final BitmapFactory.Options options = new BitmapFactory.Options();

		// 该值设为true那么将不返回实际的bitmap不给其分配内存空间而里面只包括一些解码边界信息即图片大小信息
		options.inJustDecodeBounds = true;// inJustDecodeBounds设置为true，可以不把图片读到内存中,但依然可以计算出图片的大小
		BitmapFactory.decodeFile(filePath, options);

		// Calculate inSampleSize
		options.inSampleSize = calculateInSampleSize(options, w, h);

		// Decode bitmap with inSampleSize set
		options.inJustDecodeBounds = false;// 重新读入图片，注意这次要把options.inJustDecodeBounds
		// 设为 false
		Bitmap bitmap = BitmapFactory.decodeFile(filePath, options);// BitmapFactory.decodeFile()按指定大小取得图片缩略图
		return toRoundCorner(bitmap, 8);
	}

	/**
	 * 根据路径获得图片并压缩返回bitmap用于显示
	 * 
	 * @return
	 */
	public static Bitmap getSmallBitmap(String filePath, int w, int h) {
		final BitmapFactory.Options options = new BitmapFactory.Options();

		// 该值设为true那么将不返回实际的bitmap不给其分配内存空间而里面只包括一些解码边界信息即图片大小信息
		options.inJustDecodeBounds = true;// inJustDecodeBounds设置为true，可以不把图片读到内存中,但依然可以计算出图片的大小
		BitmapFactory.decodeFile(filePath, options);

		// Calculate inSampleSize
		options.inSampleSize = calculateInSampleSize(options, w, h);

		// Decode bitmap with inSampleSize set
		options.inJustDecodeBounds = false;// 重新读入图片，注意这次要把options.inJustDecodeBounds
		// 设为 false
		Bitmap bitmap = BitmapFactory.decodeFile(filePath, options);// BitmapFactory.decodeFile()按指定大小取得图片缩略图
		return bitmap;
	}

	public static String getFilePath() {
		String path = Environment.getExternalStorageDirectory() + "/YJB/"
				+ DateFormat.format("yyyyMMddhhmmss", new Date()).toString()
				+ ".jpg";
		return path;
	}

	/**
	 * Save Bitmap to a file.保存图片到SD卡。
	 * 
	 * @param bitmap
	 * @param file
	 * @return error message if the saving is failed. null if the saving is
	 *         successful.
	 * @throws IOException
	 */
	public static String saveBitmapToFile(Bitmap bitmap, String _file)
			throws IOException {
		BufferedOutputStream os = null;
		try {
			File file = new File(_file);
			int end = _file.lastIndexOf(File.separator);
			String _filePath = _file.substring(0, end);
			File filePath = new File(_filePath);
			if (!filePath.exists()) {
				filePath.mkdirs();
			}
			file.createNewFile();
			os = new BufferedOutputStream(new FileOutputStream(file));
			bitmap.compress(Bitmap.CompressFormat.PNG, 100, os);
		} finally {
			if (os != null) {
				try {
					os.close();
				} catch (IOException e) {
					e.fillInStackTrace();
				}
			}
		}
		return _file;
	}

	// 将流转成Bitmap对象
	public static Bitmap byteToBitmap(byte[] data) {
		BitmapFactory.Options options = new BitmapFactory.Options();
		options.inJustDecodeBounds = true;
		Bitmap b = BitmapFactory.decodeByteArray(data, 0, data.length, options);
		int i = 0;
		while (true) {
			if ((options.outWidth >> i <= 1000)
					&& (options.outHeight >> i <= 1000)) {
				options.inSampleSize = (int) Math.pow(2.0D, i);
				options.inJustDecodeBounds = false;
				b = BitmapFactory
						.decodeByteArray(data, 0, data.length, options);
				break;
			}
			i += 1;
		}
		return b;
	}

	/**
	 * 通过Uri转Bitmap
	 * 
	 * @param mContext
	 * @param uri
	 * @return
	 */
	public static Bitmap getBitmapFromUri(Context mContext, Uri uri) {
		try {
			// 读取uri所在的图片
			Bitmap bitmap = MediaStore.Images.Media.getBitmap(
					mContext.getContentResolver(), uri);
			return bitmap;
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}
	}

	/**
	 * Uri地址转绝对路径
	 * 
	 * @param context
	 * @param uri
	 * @return
	 */
	public static String UriConversionAbsoluteURL(final Context context,
			final Uri uri) {
		if (null == uri)
			return null;
		final String scheme = uri.getScheme();
		String data = null;
		if (scheme == null)
			data = uri.getPath();
		else if (ContentResolver.SCHEME_FILE.equals(scheme)) {
			data = uri.getPath();
		} else if (ContentResolver.SCHEME_CONTENT.equals(scheme)) {
			Cursor cursor = context.getContentResolver().query(uri,
					new String[] { ImageColumns.DATA }, null, null, null);
			if (null != cursor) {
				if (cursor.moveToFirst()) {
					int index = cursor.getColumnIndex(ImageColumns.DATA);
					if (index > -1) {
						data = cursor.getString(index);
					}
				}
				cursor.close();
			}
		}
		return data;
	}

	/**
	 * 读取图片的旋转的角度
	 * 
	 * @param path
	 *            图片绝对路径
	 * @return 图片的旋转角度
	 */
	public static int getBitmapDegree(String path) {
		int degree = 0;
		try {
			// 从指定路径下读取图片，并获取其EXIF信息
			ExifInterface exifInterface = new ExifInterface(path);
			// 获取图片的旋转信息
			int orientation = exifInterface.getAttributeInt(
					ExifInterface.TAG_ORIENTATION,
					ExifInterface.ORIENTATION_NORMAL);
			switch (orientation) {
			case ExifInterface.ORIENTATION_ROTATE_90:
				degree = 90;
				break;
			case ExifInterface.ORIENTATION_ROTATE_180:
				degree = 180;
				break;
			case ExifInterface.ORIENTATION_ROTATE_270:
				degree = 270;
				break;
			}
		} catch (IOException e) {
			e.printStackTrace();
		}
		return degree;
	}

	/**
	 * 将图片按照某个角度进行旋转
	 * 
	 * @param bm
	 *            需要旋转的图片
	 * @param degree
	 *            旋转角度
	 * @return 旋转后的图片
	 */
	public static Bitmap rotateBitmapByDegree(Bitmap bm, int degree) {
		Bitmap returnBm = null;

		// 根据旋转角度，生成旋转矩阵
		Matrix matrix = new Matrix();
		matrix.postRotate(degree);
		try {
			// 将原始图片按照旋转矩阵进行旋转，并得到新的图片
			returnBm = Bitmap.createBitmap(bm, 0, 0, bm.getWidth(),
					bm.getHeight(), matrix, true);
		} catch (OutOfMemoryError e) {
		}
		if (returnBm == null) {
			returnBm = bm;
		}
		if (bm != returnBm) {
			bm.recycle();
		}
		return returnBm;
	}

	/**
	 * Constructs an intent for image cropping. 调用图片剪辑程序
	 */
	private static Intent getCropImageIntent(Uri photoUri) {
		Intent intent = new Intent("com.android.camera.action.CROP");
		intent.setDataAndType(photoUri, "image/*");
		intent.putExtra("crop", "true");
		intent.putExtra("aspectX", 1);
		intent.putExtra("aspectY", 1);
		intent.putExtra("outputX", 200);
		intent.putExtra("outputY", 200);
		intent.putExtra("return-data", true);
		return intent;
	}

	/**
	 * 获取圆角位图的方法
	 * 
	 * @param bitmap
	 *            需要转化成圆角的位图
	 * @param pixels
	 *            圆角的度数，数值越大，圆角越大
	 * @return 处理后的圆角位图
	 */
	@SuppressWarnings("deprecation")
	public static Bitmap toRoundCorner(Bitmap bitmap, int pixels) {
		Bitmap output = null;
		if (bitmap != null) {
			output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(),
					Config.ARGB_8888);
			Canvas canvas = new Canvas(output);
			final int color = 0xff424242;
			final Paint paint = new Paint();
			final Rect rect = new Rect(0, 0, bitmap.getWidth(),
					bitmap.getHeight());
			final RectF rectF = new RectF(rect);
			final float roundPx = pixels;
			paint.setAntiAlias(true);
			canvas.drawARGB(0, 0, 0, 0);
			paint.setColor(color);
			canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
			paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
			canvas.drawBitmap(bitmap, rect, rect, paint);
		}
		return output;
	}

	// 删除SD卡上的单个文件方法
	public static boolean deleteBitmap(String Path) {
		// SDPATH目录路径，fileName文件名
		File file = new File(Path);
		if (file == null || !file.exists() || file.isDirectory()) {
			return false;
		}
		file.delete();
		return true;
	}

}
